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-rw-r--r--app/operations/gimpoperationhistogramsink.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/app/operations/gimpoperationhistogramsink.c b/app/operations/gimpoperationhistogramsink.c
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+++ b/app/operations/gimpoperationhistogramsink.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhistogramsink.c
+ * Copyright (C) 2012 Øyvind Kolås
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "operations-types.h"
+
+#include "core/gimphistogram.h"
+
+#include "gimpoperationhistogramsink.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_AUX,
+ PROP_HISTOGRAM
+};
+
+
+static void gimp_operation_histogram_sink_finalize (GObject *object);
+static void gimp_operation_histogram_sink_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_operation_histogram_sink_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_operation_histogram_sink_attach (GeglOperation *operation);
+static void gimp_operation_histogram_sink_prepare (GeglOperation *operation);
+static GeglRectangle
+ gimp_operation_histogram_sink_get_required_for_output (GeglOperation *self,
+ const gchar *input_pad,
+ const GeglRectangle *roi);
+static gboolean gimp_operation_histogram_sink_process (GeglOperation *operation,
+ GeglOperationContext *context,
+ const gchar *output_prop,
+ const GeglRectangle *result,
+ gint level);
+
+
+G_DEFINE_TYPE (GimpOperationHistogramSink, gimp_operation_histogram_sink,
+ GEGL_TYPE_OPERATION_SINK)
+
+#define parent_class gimp_operation_histogram_sink_parent_class
+
+
+static void
+gimp_operation_histogram_sink_class_init (GimpOperationHistogramSinkClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
+
+ object_class->finalize = gimp_operation_histogram_sink_finalize;
+ object_class->set_property = gimp_operation_histogram_sink_set_property;
+ object_class->get_property = gimp_operation_histogram_sink_get_property;
+
+ gegl_operation_class_set_keys (operation_class,
+ "name" , "gimp:histogram-sink",
+ "categories" , "color",
+ "description", "GIMP Histogram sink operation",
+ NULL);
+
+ operation_class->attach = gimp_operation_histogram_sink_attach;
+ operation_class->prepare = gimp_operation_histogram_sink_prepare;
+ operation_class->get_required_for_output = gimp_operation_histogram_sink_get_required_for_output;
+ operation_class->process = gimp_operation_histogram_sink_process;
+
+ g_object_class_install_property (object_class, PROP_AUX,
+ g_param_spec_object ("aux",
+ "Aux",
+ "Auxiliary image buffer input pad.",
+ GEGL_TYPE_BUFFER,
+ G_PARAM_READWRITE |
+ GEGL_PARAM_PAD_INPUT));
+
+ g_object_class_install_property (object_class, PROP_HISTOGRAM,
+ g_param_spec_object ("histogram",
+ "Histogram",
+ "The result histogram",
+ GIMP_TYPE_HISTOGRAM,
+ G_PARAM_READWRITE));
+}
+
+static void
+gimp_operation_histogram_sink_init (GimpOperationHistogramSink *self)
+{
+}
+
+static void
+gimp_operation_histogram_sink_finalize (GObject *object)
+{
+ GimpOperationHistogramSink *sink = GIMP_OPERATION_HISTOGRAM_SINK (object);
+
+ g_clear_object (&sink->histogram);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_operation_histogram_sink_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpOperationHistogramSink *sink = GIMP_OPERATION_HISTOGRAM_SINK (object);
+
+ switch (prop_id)
+ {
+ case PROP_AUX:
+ break;
+
+ case PROP_HISTOGRAM:
+ g_value_set_pointer (value, sink->histogram);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_operation_histogram_sink_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpOperationHistogramSink *sink = GIMP_OPERATION_HISTOGRAM_SINK (object);
+
+ switch (prop_id)
+ {
+ case PROP_AUX:
+ break;
+
+ case PROP_HISTOGRAM:
+ if (sink->histogram)
+ g_object_unref (sink->histogram);
+ sink->histogram = g_value_dup_object (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_operation_histogram_sink_attach (GeglOperation *self)
+{
+ GeglOperation *operation = GEGL_OPERATION (self);
+ GObjectClass *object_class = G_OBJECT_GET_CLASS (self);
+
+ GEGL_OPERATION_CLASS (parent_class)->attach (self);
+
+ gegl_operation_create_pad (operation,
+ g_object_class_find_property (object_class,
+ "aux"));
+}
+
+static void
+gimp_operation_histogram_sink_prepare (GeglOperation *operation)
+{
+ /* XXX gegl_operation_set_format (operation, "input", babl_format ("Y u8")); */
+ gegl_operation_set_format (operation, "aux", babl_format ("Y float"));
+}
+
+static GeglRectangle
+gimp_operation_histogram_sink_get_required_for_output (GeglOperation *self,
+ const gchar *input_pad,
+ const GeglRectangle *roi)
+{
+ /* dunno what to do here, make a wild guess */
+ return *roi;
+}
+
+static gboolean
+gimp_operation_histogram_sink_process (GeglOperation *operation,
+ GeglOperationContext *context,
+ const gchar *output_prop,
+ const GeglRectangle *result,
+ gint level)
+{
+ GeglBuffer *input;
+ GeglBuffer *aux;
+
+ if (strcmp (output_prop, "output"))
+ {
+ g_warning ("requested processing of %s pad on a sink", output_prop);
+ return FALSE;
+ }
+
+ input = (GeglBuffer*) gegl_operation_context_dup_object (context, "input");
+ aux = (GeglBuffer*) gegl_operation_context_dup_object (context, "aux");
+
+ if (! input)
+ {
+ g_warning ("received NULL input");
+
+ return FALSE;
+ }
+
+ if (aux)
+ {
+ /* do hist with mask */
+
+ g_printerr ("aux format: %s\n",
+ babl_get_name (gegl_buffer_get_format (aux)));
+
+ g_object_unref (aux);
+ }
+ else
+ {
+ /* without */
+ }
+
+ g_printerr ("input format: %s\n",
+ babl_get_name (gegl_buffer_get_format (input)));
+
+ g_object_unref (input);
+
+ return TRUE;
+}